Doorcheck



`May 7, 1929. l wfv. WEBSTER DOORCHECK Filed June 5, 1928 2 Sheets-Shet l jij.

INVENTOR ATTORNEY WITNESS:

May 7, 1929.' w. v. WEBSTER 1,711,626

DOORCHECK Filed June 5,' 1928 2 Sheets-Sheet 2.

INVETOR j i I ATTORNEY l/I/l//ldm Veri: Webster 3 s 4 mm l WN 1*, Y f7 WITNESS:

Patented May 7, 1929.

Lllti ier.. f

WILll'lllrllr` VERT 7EBS'JER,v OF OTTAWA, ONTARIO, CANADA.

DOORCHECK.

Application filed June 5,

T he object of this invention is the provision of a check for swinging" doors in which spring means influences the door to closed position and fluid means offers a resistance to the spring meansy so that the door will be quietly closed.

A further object is the provision of a door check in which the operating parts thereof are adjustable so that the device may be successfully employed upon different sizes and weights of doors, and also whereby the pressure required in opening the doors may be .accurately determined as may the automatic swinging of the doors to closed positions.

-Astill further object is the provision of a check for doors that shall be connected di-v rectly to ,the door and the employment of swingable arms between the check and the door casing entirely dispensed with.

A still further object is the provision of a door check that comprises few simple parts,easily assembled and readily disassociated so that any broken or injured part may be quickly replaced.

To the attainment of the above broadly stated objects and others which will vpresent themselves as the nature of the invention is better understood7 the improvement also resides in certain other novel features of construction,` combination and operative association of parts, satisfactory embodiments of which are illustrated by the accompanying drawings. v

In the drawings: Y

Figure l is a horizontal sectional view approximately on theline l-l of Figure 2.

Figure 2 is a side elevation illustrating.

the application of the improvement, the door being swung to partly open position.

Figure 3 is a sectional view approximately on the lineIS-B of Figure 1l.

Figure lis a sectional view on the line ll-d, of Figure 8.

Figure 5 is a perspective view illustrating a` slight modication, only a portion of the door beging shown.

'Figure 6 is a sectional view approximately on the line 6 6 of Figure 5.

Figure 7 is a side elevation with parts in approximately section to illustrate the manner iii-which the improvement is attached to the door, the latter being also in section.

In the drawings, the numeral l designates a door which is hinged in a door frame or casing 2. @n the outery face of kthe door 1828. Serial No. 283,058.

eitheradjacent to the top or bottom thereof, i

secure'a cylinder 3. vThe cylinderhas both ends open, its bottom being closed by a flanged disc 4 which is screwed on the cylinder and its top being closed by asimilar disc 5. The bottom 4 is centrally formed .on its inner face with an upstanding boss 6 that is lprovided with a square opening which passes through the bottom 4:, and in this opening and fixed` to the mentioned boss 6, by pins 1l, there is a. metal post 7. The post is of a cross sectionally square formation for the major portion of its length but the outer end thereof is cross sectionally round and threaded, as at 8.

The cylindrical casing '3 is integrally formed; 1

with ears or lugs 9, which extend laterally from one ofthe faces of the casing, and which Vhave openings that `receive therethrough the means 'that secure the cylinder y j c on the door.l

The top 5 is centrally formed with an opening whose wall is surrounded byk a depending flange that merges into an -inturned yannular flange and tlrus provides a packing box within which there is received a packing 10. Received through the packing box there iswth'e tubulardrive member ll of the improvement. The drive member is really in the-nature of' an elongated nut,

the same being. provided with interior threads 12 and the saidthreads are arranged at a pitch of approximately 45. rlhe tubular drive member l1 has on itsv outer end a. cylindrical head 13 `which is peripherally provided with teeth 14;

Before the drive member l1 is arranged in the cylindrical casing 3, I position in the said cylinder a` disc in the nature of a plunger l5. The plunger has'its bore corresponding to the square cross sectional contour of the post 7 and the said'plunger is provided at spaced intervals with openings 16 that are normally closed by pivoted flat valves 17, the said valves being 'preferably provided each with an aperture 17', The

, plunger l5 is'integrally formed with a screw paired.

downwardly against the spring to likewise provide a guide for the tubular drive member 11.

The head 13 has its outer face provided with an annular depression forming a racewa'y for antifrictional balls 21, 'the second element 22 of the race-way held screwed in the threaded end 8 of the post and being,r in contact with the balls 21 by a nut 23 which is also screwed on the end 8 of the post. l cut an angular opening through the portion of the door y1 in a. line with the teeth 14C on the head 13 of the drive member V11, as indicated by the numeral 24 in Figures 1 and 2 of the drawings. Through Jthis opening there is passed a curved rack 25. Both ends of the rack have offset Aportions in the nature of ears, Athe inner ear being secured to the inner or jamb member 2 for the door 3 and the outer ear being secured to the outer member o'f the door casing, as clearly disclosed by Figure 1 of the drawings.

Preferably I fill the cylindrical body 1 with a fluid, such as oil of a light grade. The nut 23 `is not screwed too tightly against the member 22 so that the free turning of the drive member 11 is not im lVhen the door is swung to open position the drive member will turn .the screw on the plunger 15, forcing lthe same pressure of the 19. The movement of the plunger will cause the flat valvesl17 to automatically open so that fluid from the part of the chamber below the plunger will flow through the openings 16 into the upper portion of the receptacle 3, and only slightly resist the downward movement oi the plunger. Then the door is released the compressed spring 19 will expand, moving the plunger 15 in an opposite direction and to its initial position. The upward movement of the screw with the plunger will cause the drive member 1.1 to turn in an opposite direction to that just described. The fluid in the upper part ofthe cylinder 3 will now act on the valves to close the same, so that the plunger will offer a resistance to the spring to prevent the violent closing and banging of the door against the jamb orl casing. The fluid, however, will find a restricted passage through the apertures 17 in the valves 17, so that too great resistance is not offered theV s ring. Thus the door closes quietly, but t e same is held closed with sufficient pressure to prevent the sait door being accidentally opened;

1n order to adjust the tension of the spring 19 so that the device may be successfully employed upon different size and weights of doors and likewise regulate the rapidity at which the'doors are closed. l provide the lower-.portion ofthepost 7 with an elongated slot or opening 7. This end of the post hasv a central'threaded opening therethrough that `communiCates with the slot or opening 7 and engaging the threads in this opening there is a headed screw 50. The screw contacts with a pin 51 that passes transversely through the slot or opening 7", the said pin being received in a depression in the lower or outer face of a disc 52, and on this disc the lower convolution of the spring 19 rests. The head of the screw 50 is lrerfed for the reception of a screw driver bit or the like and by adjusting the screw the disc 52 will be moved longitudinally andv thereby compress or permit of the eX- pansion of theV spring 19.

The above description refers particularly to the construction disclosed in Figures 1 to 4l of the drawings, but the constructions in the remaining figures are substantially similar except that the cylindrical casing is inverted and is arranged adjacent to the boti tom of a door. Also in figures 5 to 7 of the drawings the door is designed to open inwardly while with the construction first described the door can be opened either inwardly or outwardly. The cylindrical casing is indicated by the numeral ll2 and the cross sectionally squared post by the numeral 26. The plunger 27 is provided with openings 27 and has on its lower 'face spring influenced fiat valves 28, each having a restricted opening or aperture 28 therethrough. Surrounding the post and exerting' a pressure thereagainst there is a helical spring 29. The plunger 27, on its lower face, is formed with a screw 30 whose threads have the same angle pitch those of the screw 18. The screw has a square bore for' the post 26. The screw 30 coengages with threads in the bore of a tubular drive member 31. The tubular drive member passes through packing bottom of the casing, and has on its outer end a round head 32 whose periphery is cut at an angle and formed with teeth 33. Freely journaled in a central opening in the head 32 and held from longitudinal movement therein there vis the reduced end 34 of an angle shaftl. The angle shaft '35 has an outer reduced end d0. .lournaled on this end l() there a beveled toothed wheel 3G that is in `mesh with thc teeth 33 of the wheel or head 32. rl`he toothed wheel 36 is fixed to the inner face. of. a grooved roller 37, which is also journaled on the end 110 of the angle shalt 35 and in the groove of the roller 38 there is a compressible ring or tread 38. rlhe Ynumeral 39 designates washersV for holding the roller and thc toothed wheel on the sha-ft 35. These washers are held on the ende() of the shaft by a Cotter pin or the like. The operation of this form of the improvement is similar to that previously described. The cylindrical casing is arranged on the door in a manner whereby the tread 38 for the roller 37 will frictionally box in the removableV CFI and its second end extending through the easing, and said post, for the major portion of its length being square in cross section, an apertured plunger in the casing having a serew extension that surrounds the post, swingable valves over the apertures inthe plunger, a drive member having a stem provided with a threaded bore in which the screw is received7 means on the drive member for turning the same when the door is swung, a coil spring surrounding the post and having one end contacting with the plunger, a disc surrounding the post and engaged by the second end of the spring, said post having an elongated opening therethrough and having one of its ends threaded, a headed screw `member passing through the said end of the disc and engaging the threads thereofl and entering the Opening in the said post, and a pin seat-ed in the disc, arranged transversely through the opening in the post and contacted by the screw.

In testimony whereofI athx my signature.

WILLIAM VERT VEBSTER. 

